Group 1 - The project spans approximately 131.3 kilometers, with 86.3 kilometers located in Panzhihua and 45 kilometers in Liangshan Prefecture, featuring a dual four-lane highway standard and a design speed of 80 km/h [2] - The project includes 67 bridges, 20 tunnels, and 10 interchanges, with a bridge-tunnel ratio of about 80% [2] - The construction of the Gesala Tunnel, which will be approximately 12 kilometers long, is notable as it will become the world's highest elevation difference highway tunnel upon completion [6] Group 2 - The Tongde Tunnel, measuring about 14.5 kilometers, is set to become the world's longest single-slope highway tunnel [6] - The Jinsha River Grand Bridge will be the domestic highway cable-stayed bridge with the largest width variation in the same category [6] - Once completed, the travel time from Panzhihua city to Yan County will be reduced from 5 hours to approximately 2 hours, enhancing connectivity with four major regional traffic arteries [6]

Core Insights - Four highway projects in Sichuan province have received project approval and are set to commence construction in the third quarter of this year, with a total length of approximately 458 kilometers and a total investment of about 947 billion yuan [1][4]. Group 1: Project Details - The Luhuo to Kangding Xinduqiao Expressway spans approximately 186 kilometers, with a total investment of about 344 billion yuan, designed for a speed of 80 km/h and featuring a dual four-lane configuration, with a construction period of 4 years [2][3]. - The G8517 Pingshan Xinshi to Yibin Expressway covers about 65 kilometers, with a total investment of approximately 143 billion yuan, also designed for a speed of 80 km/h and a dual four-lane setup, with a construction period of 4 years [2][3]. - The Panzhihua to Yanyuan Expressway has a length of approximately 131 kilometers, with a total investment of around 350 billion yuan, designed for a speed of 80 km/h and a dual four-lane configuration, with a construction period of 6 years [3]. - The Guang'an Ring Expressway West Section is about 76 kilometers long, with an estimated total investment of around 110 billion yuan, designed for a speed of 100 km/h and a dual four-lane setup, with a construction period of 3 years [3]. Group 2: Strategic Importance - These projects are significant for promoting investment and stabilizing growth, contributing to the development of a national comprehensive transportation network, and supporting the construction of the Chengdu-Chongqing economic circle and the implementation of the "Four Modernizations, Urban-Rural Integration, and Five Districts Co-Prosperity" development strategy [1].